/*
 * %W% %E%
 *
 * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package lib.com.sun.media.sound;

import java.util.Vector;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.lang.IllegalArgumentException;

import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.SequenceInputStream;

import lib.sound.sampled.AudioFileFormat;
import lib.sound.sampled.AudioFormat;
import lib.sound.sampled.AudioInputStream;
import lib.sound.sampled.AudioSystem;



/**
 * WAVE file format class.
 *
 * @version %I% %E%
 * @author Jan Borgersen
 */

class WaveFileFormat extends AudioFileFormat {

    /**
     * Wave format type.
     */
    private int waveType;

    //$$fb 2001-07-13: added management of header size in this class
    //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
    private static final int STANDARD_HEADER_SIZE = 28;

    //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
    /**
     * fmt_ chunk size in bytes
     */
    private static final int STANDARD_FMT_CHUNK_SIZE = 16;

    // magic numbers
    static  final int RIFF_MAGIC         = 1380533830;
    static  final int WAVE_MAGIC         = 1463899717;
    static  final int FMT_MAGIC          = 0x666d7420; // "fmt "
    static  final int DATA_MAGIC         = 0x64617461; // "data"

    // encodings
    static final int WAVE_FORMAT_UNKNOWN   = 0x0000;
    static final int WAVE_FORMAT_PCM       = 0x0001;
    static final int WAVE_FORMAT_ADPCM     = 0x0002;
    static final int WAVE_FORMAT_ALAW      = 0x0006;
    static final int WAVE_FORMAT_MULAW     = 0x0007;
    static final int WAVE_FORMAT_OKI_ADPCM = 0x0010;
    static final int WAVE_FORMAT_DIGISTD   = 0x0015;
    static final int WAVE_FORMAT_DIGIFIX   = 0x0016;
    static final int WAVE_IBM_FORMAT_MULAW = 0x0101;
    static final int WAVE_IBM_FORMAT_ALAW  = 0x0102;
    static final int WAVE_IBM_FORMAT_ADPCM = 0x0103;
    static final int WAVE_FORMAT_DVI_ADPCM = 0x0011;
    static final int WAVE_FORMAT_SX7383    = 0x1C07;


    WaveFileFormat( AudioFileFormat aff ) {

    this( aff.getType(), aff.getByteLength(), aff.getFormat(), aff.getFrameLength() );
    }

    WaveFileFormat(AudioFileFormat.Type type, int lengthInBytes, AudioFormat format, int lengthInFrames) {

    super(type,lengthInBytes,format,lengthInFrames);

    AudioFormat.Encoding encoding = format.getEncoding();

    if( encoding.equals(AudioFormat.Encoding.ALAW) ) {
        waveType = WAVE_FORMAT_ALAW;
    } else if( encoding.equals(AudioFormat.Encoding.ULAW) ) {
        waveType = WAVE_FORMAT_MULAW;
    } else if( encoding.equals(AudioFormat.Encoding.PCM_SIGNED) ||
           encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED) ) {
        waveType = WAVE_FORMAT_PCM;
    } else {
        waveType = WAVE_FORMAT_UNKNOWN;
    }
    }

    int getWaveType() {

    return waveType;
    }

    int getHeaderSize() {
    return getHeaderSize(getWaveType());
    }

    static int getHeaderSize(int waveType) {
    //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
    // use dynamic format chunk size
    return STANDARD_HEADER_SIZE + getFmtChunkSize(waveType);
    }

    static int getFmtChunkSize(int waveType) {
    //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
    // add 2 bytes for "codec specific data length" for non-PCM codecs
    int result = STANDARD_FMT_CHUNK_SIZE;
    if (waveType != WAVE_FORMAT_PCM) {
        result += 2; // WORD for "codec specific data length"
    }
    return result;
    }
}